CVE-2026-86089 Apache NiFi - Broken Access Control

Apache NiFi 2.11.0 contains a broken access control vulnerability caused by missing authorization checks on Process Groups during migration via REST API, letting authenticated users with Connector access enumerate or migrate Process Groups without proper permissions, exploit requires authenticated user with Connector read or write access.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.44% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-862

Vendor fix

Upgrade to Apache NiFi 2.12.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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